1. The sales reported on this Form 4 were effected pursuant to a trading plan adopted on December 20, 2016 pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934, as amended.

2. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $76.93 to $77.83 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (6) to this Form 4.

3. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $75.66 to $76.64 per share.

4. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $74.64 to $75.63 per share.

5. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $73.75 to $74.62 per share.

6. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $72.67 to $73.58 per share.

/s/ Christopher Frankenfield, Attorney-in-Fact

02/14/2018

** Signature of Reporting Person

Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person,
see
Instruction
4
(b)(v).